Show data table
| 1980 | 46.5% | 1996 | 45.4% | 2012 | 43.8% |
| 1981 | 47.1% | 1997 | 44.1% | 2013 | 44.7% |
| 1982 | 48% | 1998 | 43.3% | 2014 | 44.6% |
| 1983 | 48.9% | 1999 | 44.6% | 2015 | 43.4% |
| 1984 | 48.3% | 2000 | 44.3% | 2016 | 44.1% |
| 1985 | 48.6% | 2001 | 43.6% | 2017 | 44.1% |
| 1986 | 48.4% | 2002 | 42.6% | 2018 | 43.9% |
| 1987 | 48.4% | 2003 | 42.6% | 2019 | 44% |
| 1988 | 47.4% | 2004 | 42.8% | 2020 | 44.1% |
| 1989 | 44.8% | 2005 | 42.9% | 2021 | 43.6% |
| 1990 | 44.7% | 2006 | 44% | 2022 | 43.3% |
| 1991 | 47.5% | 2007 | 43.1% | 2023 | 43.6% |
| 1992 | 47.1% | 2008 | 44.2% | 2024 | 43.5% |
| 1993 | 47.7% | 2009 | 43.4% | 2025 | 43.3% |
| 1994 | 45.9% | 2010 | 43.6% | 2026 | 43.5% |
| 1995 | 45.2% | 2011 | 43.4% | | |
Show data table
| 1980 | 81.2B | 1996 | 157B | 2012 | 288B |
| 1981 | 86.4B | 1997 | 163B | 2013 | 297B |
| 1982 | 91.6B | 1998 | 171B | 2014 | 302B |
| 1983 | 96.9B | 1999 | 187B | 2015 | 304B |
| 1984 | 100B | 2000 | 201B | 2016 | 318B |
| 1985 | 105B | 2001 | 211B | 2017 | 331B |
| 1986 | 108B | 2002 | 214B | 2018 | 346B |
| 1987 | 110B | 2003 | 219B | 2019 | 365B |
| 1988 | 112B | 2004 | 228B | 2020 | 360B |
| 1989 | 112B | 2005 | 237B | 2021 | 389B |
| 1990 | 119B | 2006 | 258B | 2022 | 430B |
| 1991 | 133B | 2007 | 268B | 2023 | 458B |
| 1992 | 138B | 2008 | 288B | 2024 | 488B |
| 1993 | 143B | 2009 | 273B | 2025 | 511B |
| 1994 | 145B | 2010 | 280B | 2026 | 535B |
| 1995 | 149B | 2011 | 284B | | |
Show data table
| 1980 | 50.6% | 1996 | 47.3% | 2012 | 47.6% |
| 1981 | 52.3% | 1997 | 45.7% | 2013 | 47.5% |
| 1982 | 53.9% | 1998 | 44.6% | 2014 | 46.7% |
| 1983 | 54.5% | 1999 | 44.3% | 2015 | 45.3% |
| 1984 | 54.5% | 2000 | 43.2% | 2016 | 43.9% |
| 1985 | 52.9% | 2001 | 44.1% | 2017 | 42.8% |
| 1986 | 52.6% | 2002 | 44.8% | 2018 | 42.4% |
| 1987 | 53.6% | 2003 | 45.8% | 2019 | 42.1% |
| 1988 | 51.7% | 2004 | 44.7% | 2020 | 47.8% |
| 1989 | 49.9% | 2005 | 43.4% | 2021 | 45.9% |
| 1990 | 48.8% | 2006 | 44% | 2022 | 43.3% |
| 1991 | 49.6% | 2007 | 43.3% | 2023 | 44% |
| 1992 | 50.2% | 2008 | 44.3% | 2024 | 44.4% |
| 1993 | 50.9% | 2009 | 48.4% | 2025 | 45.1% |
| 1994 | 49.4% | 2010 | 48.9% | 2026 | 46.2% |
| 1995 | 53.9% | 2011 | 47.8% | | |
Show data table
| 1980 | 88.5B | 1996 | 163B | 2012 | 314B |
| 1981 | 95.9B | 1997 | 169B | 2013 | 316B |
| 1982 | 103B | 1998 | 176B | 2014 | 317B |
| 1983 | 108B | 1999 | 186B | 2015 | 316B |
| 1984 | 113B | 2000 | 195B | 2016 | 316B |
| 1985 | 115B | 2001 | 213B | 2017 | 321B |
| 1986 | 118B | 2002 | 225B | 2018 | 334B |
| 1987 | 122B | 2003 | 236B | 2019 | 349B |
| 1988 | 123B | 2004 | 237B | 2020 | 390B |
| 1989 | 125B | 2005 | 240B | 2021 | 409B |
| 1990 | 130B | 2006 | 258B | 2022 | 430B |
| 1991 | 139B | 2007 | 269B | 2023 | 462B |
| 1992 | 147B | 2008 | 288B | 2024 | 499B |
| 1993 | 153B | 2009 | 305B | 2025 | 533B |
| 1994 | 156B | 2010 | 314B | 2026 | 567B |
| 1995 | 178B | 2011 | 313B | | |